Opera palette
Marble Foundry
From #004c7d ink through #0075bb, #3191d9, #56a0de to #72bdfc light, Marble Foundry is a split-complementary progression that holds together at any size. Use it for national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA for large text.
skyoperafive-stop
#004c7d
#0075bb
#3191d9
#56a0de
#72bdfc
The generator opens with #004c7d as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.